Book Image

Performance Testing with JMeter 3 - Third Edition

By : Bayo Erinle
Book Image

Performance Testing with JMeter 3 - Third Edition

By: Bayo Erinle

Overview of this book

JMeter is a Java application designed to load and test performance for web application. JMeter extends to improve the functioning of various other static and dynamic resources. This book is a great starting point to learn about JMeter. It covers the new features introduced with JMeter 3 and enables you to dive deep into the new techniques needed for measuring your website performance. The book starts with the basics of performance testing and guides you through recording your first test scenario, before diving deeper into JMeter. You will also learn how to configure JMeter and browsers to help record test plans. Moving on, you will learn how to capture form submission in JMeter, dive into managing sessions with JMeter and see how to leverage some of the components provided by JMeter to handle web application HTTP sessions. You will also learn how JMeter can help monitor tests in real-time. Further, you will go in depth into distributed testing and see how to leverage the capabilities of JMeter to accomplish this. You will get acquainted with some tips and best practices with regard to performance testing. By the end of the book, you will have learned how to take full advantage of the real power behind Apache JMeter.
Table of Contents (17 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
Index

Tracking errors during test execution


JMeter keeps track of all errors that occur during a test in a log file named jmeter.log by default. The file resides in the folder from which JMeter was launched. The name of this log file, like most things, can be configured in jmeter.properties or via a command-line parameter, -j <name_of_log_file>. When running the GUI, the error count is indicated in the top-right corner, that is, to the left of the number of threads running for the test, as shown in the following screenshot. Clicking on it reveals the log file contents directly at the bottom of the GUI. The log file provides an insight into what exactly is going on in JMeter when your tests are being executed and helps determine the cause of error(s) when they occur:

JMeter GUI error count/indicator